#!/usr/bin/env bash

set -u
set -e

export ROOT_PATH="$(cd $(dirname $0); echo $PWD)"
OUTPUT_DIRECTORY="$ROOT_PATH/output"
EXPORT_DIRECTORY=""

UPDATE_SUBMODULES=false
CONFIGURATION="Release"
BUILD_PLATFORM="Any CPU"
CLEAN=false
PACKAGES=false
NIGHTLY=false
PORTABLE=false
HEADLESS=false
SKIP_FETCH=false
NET=false
TFM="net6.0"
PARAMS=()
CUSTOM_PROP=
NET_FRAMEWORK_VER=
RID="linux-x64"

function print_help() {
  echo "Usage: $0 [-cdvspnt] [-b properties-file.csproj] [--no-gui] [--skip-fetch] [--profile-build]"
  echo ""
  echo "-c                                clean instead of building"
  echo "-d                                build Debug configuration"
  echo "-v                                verbose output"
  echo "-p                                create packages after building"
  echo "-n                                create nightly packages after building"
  echo "-t                                create a portable package (experimental, Linux only)"
  echo "-s                                update submodules"
  echo "-b                                custom build properties file"
  echo "-o                                custom output directory"
  echo "--skip-fetch                      skip fetching submodules and additional resources"
  echo "--no-gui                          build with GUI disabled"
  echo "--force-net-framework-version     build against different version of .NET Framework than specified in the solution"
  echo "--net                             build with dotnet"
  echo "-B                                bundle target runtime (default value: $RID, requires --net, -t)"
  echo "--profile-build                   build optimized for tlib profiling"
}

while getopts "cdvpnstb:o:B:-:" opt
do
  case $opt in
    c)
      CLEAN=true
      ;;
    d)
      CONFIGURATION="Debug"
      ;;
    v)
      PARAMS+=(verbosity:detailed)
      ;;
    p)
      PACKAGES=true
      ;;
    n)
      NIGHTLY=true
      PACKAGES=true
      ;;
    t)
      PORTABLE=true
      ;;
    s)
      UPDATE_SUBMODULES=true
      ;;
    b)
      CUSTOM_PROP=$OPTARG
      ;;
    o)
      EXPORT_DIRECTORY=$OPTARG
      echo "Setting the output directory to $EXPORT_DIRECTORY"
      ;;
    B)
      RID=$OPTARG
      ;;
    -)
      case $OPTARG in
        "no-gui")
          HEADLESS=true
          ;;
        "skip-fetch")
          SKIP_FETCH=true
          ;;
        "force-net-framework-version")
          shift $((OPTIND-1))
          NET_FRAMEWORK_VER=p:TargetFrameworkVersion=v$1
          PARAMS+=($NET_FRAMEWORK_VER)
          OPTIND=2
          ;;
        "net")
          NET=true
          PARAMS+=(p:NET=true)
          ;;
        "profile-build")
          PARAMS+=('p:TlibProfilingBuild=true')
          ;;
        *)
          print_help
          exit 1
          ;;
      esac
      ;;
    \?)
      print_help
      exit 1
      ;;
  esac
done
shift "$((OPTIND-1))"

if [ -n "${PLATFORM:-}" ]
then
    echo "PLATFORM environment variable is currently set to: >>$PLATFORM<<"
    echo "This might cause problems during the build."
    echo "Please clear it with:"
    echo ""
    echo "    unset PLATFORM"
    echo ""
    echo " and run the build script again."

    exit 1
fi

# We can only update parts of this repository if Renode is built from within the git tree
if [ ! -e .git ]
then
  SKIP_FETCH=true
  UPDATE_SUBMODULES=false
fi

if $SKIP_FETCH
then
  echo "Skipping init/update of submodules"
else
  # Update submodules if not initialized or if requested by the user
  # Warn if not updating, but unclean
  # Disabling -e to allow grep to fail
  set +e
  git submodule status --recursive | grep -q "^-"
  SUBMODULES_NOT_INITED=$?

  git submodule status --recursive | grep -q "^+"
  SUBMODULES_NOT_CLEAN=$?
  set -e
  if $UPDATE_SUBMODULES || [ $SUBMODULES_NOT_INITED -eq 0 ]
  then
      echo "Updating submodules..."
      git submodule update --init --recursive
  elif [ $SUBMODULES_NOT_CLEAN -eq 0 ]
  then
      echo "Submodules are not updated. Use -s to force update."
  fi
fi

. "${ROOT_PATH}/tools/common.sh"

if $SKIP_FETCH
then
  echo "Skipping library fetch"
else
  "${ROOT_PATH}"/tools/building/fetch_libraries.sh
fi

if $HEADLESS
then
    BUILD_TARGET=Headless
    PARAMS+=(p:GUI_DISABLED=true)
elif $ON_WINDOWS
then
    BUILD_TARGET=Windows
    TFM="net6.0-windows10.0.17763.0"
else
    BUILD_TARGET=Mono
fi

if $NET
then
  CS_COMPILER="dotnet build"
  TARGET="`get_path \"$PWD/Renode_NET.sln\"`"
else
  TARGET="`get_path \"$PWD/Renode.sln\"`"
fi

# Verify Mono and mcs version on Linux and macOS
if ! $ON_WINDOWS && ! $NET
then
    if ! [ -x "$(command -v mcs)" ]
    then
        MINIMUM_MONO=`get_min_mono_version`
        echo "mcs not found. Renode requries Mono $MINIMUM_MONO or newer. Please refer to documentation for installation instructions. Exiting!"
        exit 1
    fi

    verify_mono_version
fi

# Copy properties file according to the running OS
mkdir -p "$OUTPUT_DIRECTORY"
if [ -n "${CUSTOM_PROP}" ]; then
    PROP_FILE=$CUSTOM_PROP
else
    if $ON_OSX
    then
      PROP_FILE="${CURRENT_PATH:=.}/src/Infrastructure/src/Emulator/Cores/osx-properties.csproj"
    elif $ON_LINUX
    then
      PROP_FILE="${CURRENT_PATH:=.}/src/Infrastructure/src/Emulator/Cores/linux-properties.csproj"
    else
      PROP_FILE="${CURRENT_PATH:=.}/src/Infrastructure/src/Emulator/Cores/windows-properties.csproj"
    fi
fi
cp "$PROP_FILE" "$OUTPUT_DIRECTORY/properties.csproj"

if ! $NET
then
  # Assets files are not deleted during `dotnet clean`, as it would confuse intellisense per comment in https://github.com/NuGet/Home/issues/7368#issuecomment-457411014,
  # but we need to delete them to build Renode again for .NETFramework since `project.assets.json` doesn't play well if project files share the same directory.
  # If `Renode_NET.sln` is picked for OmniSharp, it will trigger reanalysis of the project after removing assets files.
  # We don't remove these files as part of `clean` target, because other intermediate files are well separated between .NET and .NETFramework
  # and enforcing `clean` every time before rebuilding would slow down the build process on both frameworks.
  find $ROOT_PATH -type f -name 'project.assets.json' -delete
fi

# Build CCTask in Release configuration
CCTASK_OUTPUT=`mktemp`
CCTASK_BUILD_ARGS=($NET_FRAMEWORK_VER p:Configuration=Release p:Platform="\"$BUILD_PLATFORM\"")
set +e
CCTASK_SLN=CCTask.sln
if $NET
then
    CCTASK_SLN=CCTask_NET.sln
fi
eval "$CS_COMPILER $(build_args_helper "${CCTASK_BUILD_ARGS[@]}") $(get_path $ROOT_PATH/lib/cctask/$CCTASK_SLN)" 2>&1 > $CCTASK_OUTPUT

if [ $? -ne 0 ]; then
    cat $CCTASK_OUTPUT
    rm $CCTASK_OUTPUT
    exit 1
fi
rm $CCTASK_OUTPUT
set -e

# clean instead of building
if $CLEAN
then
    if ! $NET
    then
      PARAMS+=(t:Clean)
    fi
    for conf in Debug Release
    do
      for build_target in Windows Mono Headless
      do
        if $NET
        then
            dotnet clean $(build_args_helper ${PARAMS[@]}) $(build_args_helper p:Configuration=${conf}${build_target}) "$TARGET"
        else
            $CS_COMPILER $(build_args_helper ${PARAMS[@]}) $(build_args_helper p:Configuration=${conf}${build_target}) "$TARGET"
        fi
      done
      rm -fr $OUTPUT_DIRECTORY/bin/$conf
    done
    exit 0
fi

# check weak implementations of core libraries
pushd "$ROOT_PATH/tools/building" > /dev/null
./check_weak_implementations.sh
popd > /dev/null

PARAMS+=(p:Configuration=${CONFIGURATION}${BUILD_TARGET} p:GenerateFullPaths=true p:Platform="\"$BUILD_PLATFORM\"")

# build
eval "$CS_COMPILER $(build_args_helper "${PARAMS[@]}") $TARGET"

# copy llvm library
if $NET
then
  cp src/Infrastructure/src/Emulator/Peripherals/bin/$CONFIGURATION/$TFM/libllvm-disas.* output/bin/$CONFIGURATION/$TFM
else
  cp src/Infrastructure/src/Emulator/Peripherals/bin/$CONFIGURATION/libllvm-disas.* output/bin/$CONFIGURATION
fi

# build packages after successful compilation
params=""

if [ $CONFIGURATION == "Debug" ]
then
    params="$params -d"
fi

if [ -n "$EXPORT_DIRECTORY" ]
then
    if [ "${DETECTED_OS}" != "linux" ]
    then
        echo "Custom output directory is currently available on Linux only"
        exit 1
    fi

    $ROOT_PATH/tools/packaging/export_${DETECTED_OS}_workdir.sh $EXPORT_DIRECTORY $params
    echo "Renode built to $EXPORT_DIRECTORY"
fi

if $PACKAGES && $NIGHTLY
then
    params="$params -n"
fi

if $PACKAGES
then
    if $NET
    then
        # Restore dependecies for linux-x64 runtime. It prevents error NETSDK1112 during publish.
        dotnet restore --runtime linux-x64 Renode_NET.sln

        eval "dotnet publish -f $TFM --self-contained false $(build_args_helper "${PARAMS[@]}") $TARGET"
        export RID TFM
        $ROOT_PATH/tools/packaging/make_linux_dotnet_package.sh $params
    else
        $ROOT_PATH/tools/packaging/make_${DETECTED_OS}_packages.sh $params
        $ROOT_PATH/tools/packaging/make_source_package.sh $params
    fi
fi

if $PORTABLE
then
    PARAMS+=(p:PORTABLE=true)
    if $ON_LINUX
    then
      if $NET
      then
          eval "dotnet publish -r $RID -f $TFM --self-contained true $(build_args_helper "${PARAMS[@]}") $TARGET"
          export RID TFM
          $ROOT_PATH/tools/packaging/make_linux_portable_dotnet.sh $params
      else
          $ROOT_PATH/tools/packaging/make_linux_portable.sh $params
      fi
    else
      echo "Portable packages are only available on Linux. Exiting!"
      exit 1
    fi
fi